diff --git a/.github/workflows/osgeo4w.yml b/.github/workflows/osgeo4w.yml
index 0e4455ead96..6c067e5f73f 100644
--- a/.github/workflows/osgeo4w.yml
+++ b/.github/workflows/osgeo4w.yml
@@ -79,11 +79,11 @@ jobs:
         env:
           Deps2: >-
             ${{
-            join(toJson( '[proj-devel,gdal-devel,geos-devel,libtiff-devel,libpng-devel,netcdf-devel
+            join(fromJson(toJson( '[proj-devel,gdal-devel,geos-devel,libtiff-devel,libpng-devel,netcdf-devel
               ,cairo-devel,fftw,freetype-devel,gdal-ecw
               ,gdal-mrsid,liblas-devel,libxdr,libpq-devel,pdcurses
               ,python3-matplotlib,python3-numpy,python3-ply,python3-pywin32
-              ,python3-wxpython,zstd-devel ]' ), '_xy?')
+              ,python3-wxpython,zstd-devel ]' )), '_xy?')
             }}